Abstract:

To solve the problem that a single mobile platform cannot satisfy the system observability if it does not have a higher level movement than maneuvering target under bearings-only system, a passive location algorithm which is suitable for multiple mobile platforms is proposed. The algorithm based on the geometric relationships between the targets and platforms can get a pseudo linear system of equations including the initial position and velocity of target. To reduce the amount of calculation for solving system of equations and ensure real-time positioning, deal with the conventional least square method is deal with sliding window way, and the solution of equations is further expressed as the recursive form. Through the analysis of the observation vector and matrix of the equations, the unbiasedness of the algorithm is proved. Simulations experiments verify the effectiveness of the algorithm, the affections of the factors of platform motion such as speed and direction on the position performance of algorithm are discussed, and the relationship between the target and platforms that can obtain the position performance is gotten.